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Original implementation of Blur Image Filters

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With Gaussian, fast Gaussian, Hashed and morphological (opening and closing) methods. Remembering shader code for other fast methods.
This commit is contained in:
Bruno Herbelin
2022-05-31 00:34:37 +02:00
parent 662d8bcfda
commit e3bb95b3dd
27 changed files with 628 additions and 155 deletions
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56
ImageFilter.h
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@@ -3,6 +3,7 @@
#include <map>
#include <list>
#include <vector>
#include <string>
#include <future>
@@ -69,22 +70,21 @@ class ImageFilter : public FrameBufferFilter
{
FilteringProgram program_;
std::pair< Surface *, Surface *> surfaces_;
std::pair< FrameBuffer *, FrameBuffer * > buffers_;
std::pair< ImageFilteringShader *, ImageFilteringShader *> shaders_;
public:
// instanciate an image filter at given resolution
ImageFilter();
~ImageFilter();
virtual ~ImageFilter();
// set the program
void setProgram(const FilteringProgram &f, std::promise<std::string> *ret = nullptr);
// get copy of the program
FilteringProgram program() const;
// update parameters of program
void setProgramParameters(const std::map< std::string, float > &parameters);
void setProgramParameter(const std::string &p, float value);
// implementation of FrameBufferFilter
Type type() const override { return FrameBufferFilter::FILTER_IMAGE; }
uint texture () const override;
@@ -92,7 +92,51 @@ public:
void update (float dt) override;
void draw (FrameBuffer *input) override;
void accept (Visitor& v) override;
protected:
std::pair< Surface *, Surface *> surfaces_;
std::pair< FrameBuffer *, FrameBuffer * > buffers_;
std::pair< ImageFilteringShader *, ImageFilteringShader *> shaders_;
void updateParameters();
};
class BlurFilter : public ImageFilter
{
public:
BlurFilter();
virtual ~BlurFilter();
// Algorithms used for blur
typedef enum {
BLUR_GAUSSIAN = 0,
BLUR_HASH,
BLUR_OPENNING,
BLUR_CLOSING,
BLUR_FAST,
BLUR_INVALID
} BlurMethod;
static const char* method_label[BLUR_INVALID];
BlurMethod method () const { return method_; }
void setMethod(int method);
// implementation of FrameBufferFilter
Type type() const override { return FrameBufferFilter::FILTER_BLUR; }
void draw (FrameBuffer *input) override;
void accept (Visitor& v) override;
private:
BlurMethod method_;
static std::vector< FilteringProgram > programs_;
Surface *mipmap_surface_;
FrameBuffer *mipmap_buffer_;
};
#endif // IMAGEFILTER_H